diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..4f42346
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,25 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1764983851,
+        "narHash": "sha256-y7RPKl/jJ/KAP/VKLMghMgXTlvNIJMHKskl8/Uuar7o=",
+        "rev": "d9bc5c7dceb30d8d6fafa10aeb6aa8a48c218454",
+        "revCount": 902883,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.2511.902883%2Brev-d9bc5c7dceb30d8d6fafa10aeb6aa8a48c218454/019af9e3-4981-798f-83ae-1c022e08ffcc/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/NixOS/nixpkgs/0"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
index 42079f6..bb7860d 100755
--- a/flake.nix
+++ b/flake.nix
@@ -42,8 +42,9 @@
                   libcxx
                 ];
                 shellHook = ''
-                  		    echo "welcome to c++ devshell nyaaa :3"
+                  		                echo "welcome to c++ devshell nyaaa :3"
                 '';
+                NIX_BUILD_SHELL = "zsh";
               };
         }
       );
diff --git a/main.cpp b/main.cpp
index 751a3d3..e851d19 100755
--- a/main.cpp
+++ b/main.cpp
@@ -1,10 +1,10 @@
 #include <iostream>
-#include <string>
 
 using namespace std;
 
-int main() {
-    string bla = "hello world";
-    cout << bla << std::endl;
-    return 0;
+int main(int argc, char **argv) {
+  for (int i = 0; i <= argc; i++) {
+    cout << argv[i] << endl;
+  }
+  return 0;
 }
diff --git a/meson.build b/meson.build
index 5476024..da9ddaa 100755
--- a/meson.build
+++ b/meson.build
@@ -1,3 +1,5 @@
-project('flake', 'cpp',
-default_options: ['cpp_std=c++20'])
-executable('flake', 'main.cpp')
+project('hello',
+        'cpp',
+        version: '1.0',
+default_options: ['cpp_std=c++20', 'optimization=2'])
+executable('hello', 'main.cpp')